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Insights into Imaging
Fig. 5 | Insights into Imaging

Fig. 5

From: Differential diagnoses of COVID-19 pneumonia: the current challenge for the radiologist—a pictorial essay

Fig. 5

a–d COVID-19 pneumonia differential diagnoses: aspiration pneumonia, pulmonary alveolar proteinosis. HRTCs of two patients affected by fluid aspiration pneumonia presenting with bilateral, dependent and confluent consolidative foci (white arrows in a) and chronic lipoid pneumonia (b, c), showing a low density consolidation (mean:- 46UH in white circle in c) surrounded by a crazy paving halo (black oval b). Pulmonary alveolar proteinosis is characterised by bilateral areas of crazy paving (black arrows in d) and a peculiar juxtaposition of severely affected secondary lobules and normal secondary lobules

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